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Pop now turning off and on

Last response: in Systems
November 27, 2012 11:55:23 AM

Hello, this morning I moved my computer from downstairs to upstairs , turned it on and I heard a pop and it turned straight off. When I turn the computer on now it just starts (blank screen, no beeps, no bios) for about 3-4 seconds and turns off and starts again in this looping fashion, all the fans come on including the Psu. Having a quick look about a lot of people suggested when this happens its usually the Psu, I've just bought a new one and its still doing the same thing. I've also tried a CMOS reset using the button on the motherboard. I move my computer quite alot as I use it at work sometimes aswell, when I took the system apart to rebuild it outside the case, I noticed a motherboard screw was on the floor if the case. If anyone could suggest anything else please let me know, my computer set us is below:

Motherboard: Msi ms-7681 ver 2.01 / P67a - gd53 (b3)
CPU: I5-2500k 3.30 ghz quad core
Graphics card: GeForce GTX 560 Ti
Ram: 2 x 4gb - 8gb patriot
Old Psu: Corsair gs700
New Psu: Corsair cx600

Any help is much appreciated, kind regards, Dan.

More about : pop turning

November 27, 2012 12:05:15 PM

Sorry it won't let me edit my post.
Also when the pop happened I smelt some burning, but 2 minutes later I couldn't smell it anywhere, I checked every connection when taking the pc out the case and I couldn't find the smell anywhere, not even in the Psu, no burn marks anywhere, no nothing.
a b V Motherboard
November 27, 2012 12:31:12 PM

take a look at the motherboard do you see any capacitors that look like this?
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November 27, 2012 12:39:19 PM

Hello, thanks for your reply, I've just had a good look right around the board a few times, at all the capacitors and they all look fine. Dan
November 27, 2012 5:12:51 PM

Any other ideas guys? Do you think the motherboard or CPU could of blown?
a b B Homebuilt system
November 27, 2012 5:35:53 PM

Pop to me would have said capacitor. If the motherboard looks ok, I would try with a good power supply next. It may be the power supply is giving enough juice to run fans, but not enough to power the components.
November 27, 2012 5:47:36 PM

Thanks for your reply but I went out and bought a new power supply today and its still doing the same thing. Just starts up 3-5 seconds later turns off and then starts again in a cycle. :/ 
a b B Homebuilt system
November 28, 2012 1:48:56 AM

I would say probably your motherboard then, it could be the CPU, but the CPU's going out seems to be a lot more rare than motherboards.